Gulf War veterans are sick. And they're angry. They are convinced their illnesses come from exposures to chemicals, vaccines and biological agents during the war. But scientists on four blue-ribbon panels say the veterans' symptoms come from psychological stress similar to the kind found after other wars. Who's right?

In "Last Battle of the Gulf War," FRONTLINE takes a clear-eyed look at the history and politics behind 'Gulf War Syndrome' and examines the key scientific and medical issues - showing why scientists conclude stress is the most likely explanation. This is an absorbing, close-up look at how the whole controversy played out -- in Congress, among veterans and their advocates and, in the media which frequently failed to provide medical and scientific context in their reporting.

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